Caves, Tunnels, Sewers: How Bear Grylls Survives Underground

single condition is trueParagraph count: 16If there are more than 3 paragraphs, insert after the 3rd paragraph

Not many people like being in underground spaces, but survivalist Bear Grylls has explored many tunnel systems during his life. He has written about how, during his school days, he led his fellow pupils from Eton on secret night-time adventures such as crossing the local town via its old sewers. In his biography Mud, Sweat […]